Dental engine



(N0 Modem 7 0. H. '& A. F. PIEPER.

I V: DENTAL ENGINE. N0. 5152:7423- 1 Patented June 23, 1896.

Witnesses.-

UNITED STATES PATENT if Qrrrcn.

OSCAR I-LPIEPER AND ALPHoNsE r. PIEPER, or SAN JOSE, oamrounrn.

DENTAL ENGINE.

SPECIFICATION forming part of Letters Patent No. 562,742, dated June 23, 1896.

Application filed January 29, 1895. $erial1l'o. 53 6,565. (No model.)

To all whom it may concern.-

Be it known that we, OSCAR H. PIEPER and ALPHONSE F. Prnrnn, citizens of the United States, and residents of San Jose, in the county of Santa Clara and State of California, have invented certain new and useful 11nprovements in Dental Apparatus, as hereinafter described; and we hereby declare that the specification and drawings hereto at tached constitute a complete description of our improvements and of the manner of constructin g and applying the same.

Our invention relates to dental apparatus employing motive power to operate various implements, and to the method of arranging such motive power and the elements of transmission, to secure convenience and celerity in the various operations to be performed.

Our improvements consist in the construction, arrangement, and combination of parts, substantially as will be hereinafter described and claimed.

Referring to the drawings herewith, illustrating the manner of applying our invention,

Figure 1 shows a motive apparatus mounted according to our invention. Fig. 2 is an enlarged partial side view of the motor in a plane opposite to Fig. 1.

Similar letters of reference are employed to designate like parts in the two figures of the drawings.

Referring to the drawings, A is a wall, to which the swinging bracket B is attached by the pivotal bearings O O.

D is an electric motor inclosed in a spherical case, and made in accordance with our application for Letters Patent, Serial No. 509,585, filed April 30, 1894, for improvements in electrical apparatus for operating dental implements, but such a motor can be of any form or nature that admits of suspension in a similar manner. This motor D we support in a gimbal-frame E, which is suspended by a cord or cable F, which contains the conducting-wires, passing over the pulleys G G down along the wall A, and to a rheostat H, the latter so arranged as to be controlled by the foot of an operator.

Through the cable or cord F and the gim bal-frame E passes the required wires for conducting electrical current and controlling the movements of the motor D, entering through the axes Q or R, or both, in the usual manner.

The bracket B is made in two parts, having a telescopic section I, that can be moved out or in, and fastened in any required position by means of a screw J, so the flexible driving-shaft K and the implements L can be brought over or to either side of a dental chair M, as seen in Fig. 1.

On the cable or cord F we place a counterweight N, that balances or partially balances the motor D, so the latterwill remain after adj ustment at various heights from the chair M.

When the flexible shaft or transmissiontube K is to be led off at an angle, or horr zontally in respect to the motor D, we provide a latch or detent O, that slides on the gimbal-frameE and engages a notched sector P, attached to the motor D, so the latter can be fixed in various positions, or at diiferent angles, as seen in Fig. 2.

The constructive details of the motor D, the flexible shaft K, dental implements L, and the rheostat H being set forth in our application for Letters Patent hereinbefore cited, and in our application for Letters Patent, Serial No. 509,584, filed April 30, 1894:, in electrical controlling apparatus for motors, no further description of these elements is required here.

Having thus explained the nature and obj ects of our invention and the method of constructing the same, what we claim as new, and desire to secure by Letters Patent, is-

l. In a dental apparatus, the combination of an implement-operating motor having an axis, a frame in which the axis is adjustably supported, acounterweighted cable on which the frame is suspended so as to be vertically adjustable, and means for holding the motor in any position to which it may be adjusted about its axis, substantially as described.

2. In a dental apparatus, the combination of the motor, the gimbahframe in which it is supported, the suspending rope or cable attached to the gimbal frame, the movable bracket having pulleys for the said rope or cable, a counterweight on the rope, substantially as described.

3. In a dental apparatus, a suspended motor, a gimbal-frame holding the same, to pertent on the frame that engages the sector.

wit it to be adjustable about its own axis, substantially as described.

and a latch or detent to hold the motor in the In testimony whereof We have hereunto afvarious positions to Which it may be adjusted fixed our signatures in the presence of two 15 5 together with means for engaging the latch lwitnesses.

or detent, substantially as described. 1 a

4. In a dental apparatus, the combination of an implement-operating motor having a horizontal axis, a gimbal-fralne supporting it, Vitnesses:

IO a rope or cable attached to the said frame, a GEO. D. SMITH,

notched sector on the motor, and a sliding de- CHAS. H. PIEPER. 

